Conconully Granodiorite is named. Is a postmetamorphic orthomagmatic pluton of batholithic dimensions in the Okanogan Range, WA. Consists predominantly of granodiorite but composition ranges from quartz diorite to quartz monzonite. Is subdivided into three mappable phases on the basis of texture and composition: the main phase contains plagioclase, quartz, and pinkish potash feldspar, locally subporphyritic, and is the most widespread variety of rock; the Mineral Hill phase contains potash feldspar megacrysts, as much as 5 cm in diameter, and local green hornblende in a main phase-type groundmass; the Ritchie Ridge phase is similar to the main phase but is finer grained. Weathered nature of the granodiorite distinguishes it from local felsic plutonic rocks except for the Pogue Mountain Quartz Monzonite and the Leader Mountain Granodioritic Gneiss. Intrudes the Salmon Creek Schists and Gneisses, Summit-Frazer Trondhjemitic Gneiss (new), Leader Mountain Granodioritic Gneiss, and Windy Hill Quartz Dioritic Orthogneiss (new). Is intruded by the Leader Lake Quartz Monzonite (new), which may be a later differentiate of the same parent magma. Age is Late Cretaceous. (B1565)

Source: GNU records (USGS DDS-6; Menlo GNULEX).